she'd used as a reserve deputy. this has got to be just more than your brain can absorb. >> definitely. yeah. >> reporter: little sister, i'll always love you. and now he's going downtown, he's about to be charged. >> yep. i couldn't understand it. we wouldn't ever dream or understand that happen it could be him. >> reporter: seth's dream was to drive a sheriff's car as a deputy. now the wannabe cop was cuffed, riding in the back seat, and about to be charged with the murder of his wife. coming up -- together techel goes on trial. but before it even starts, the prosecution suffers a major blow. >> bad for us, good for them. great for them. >> reporter: and then a clue you haven't heard about could change everything. >> i believe it to be the most compelling piece of evidence in the whole case. the whole case the peñas are saving big holiday shopping at amazon. so now, they're free to become...